同时同频全双工非线性自干扰抑制研究  

Research on Nonlinear Self Interference Cancellation Techniques of CCFD Radios

作　　者：肖尚辉[1] 张梦瑶 全欣 刘颖[1] 邵士海[1] 唐友喜[1] Xiao Shanghui;Zhang Mengyao;Quan Xin;Liu Ying;Shao Shihai;Tang Youxi(UESTC,Chengdu 611731,China;South-west Jiaotong University,Chengdu 611756,China)

机构地区：[1]电子科技大学,四川成都611731 [2]西南交通大学,四川成都611756

出　　处：《邮电设计技术》2021年第12期32-39,共8页Designing Techniques of Posts and Telecommunications

基　　金：国家自然科学基金资助项目(62071094,61901396,U19B2014,61771107,61601064);中央高校基本科研业务费专项资助(2682020CX83);四川科技项目(2020YFH0101)。

摘　　要：同时同频全双工在相同频率资源上同时进行信号的收发,频谱利用率理论上可以提升1倍,因此受到广泛关注。然而,全双工设备在接收信号的同时,也会遭受本地信号发射带来的强干扰。针对强干扰信号的非线性典型特征,分析了非线性自干扰抑制技术,并探讨大功率发射和阵列天线场景中,可能的非线性干扰抑制方法,为大功率、多天线全双工设备研制提供架构和算法层面的设计指导。Co-time and Co-frequency Full Duplex(CCFD)technique enables a radio to transmit and receive signals simultaneously using the same frequency resources,and hence doubles the spectrum efficiency theoretically.However,a CCFD radio will suffer from severe self-interference(SI)caused by local signal transmission during signal reception procedure.According to the inherent nonlinear characteristics of the self-interference signals,it analyzes the nonlinear self-interference cancellation(SIC)techniques,and discusses possible nonlinear interference suppression methods in high-power transmission and array antenna scenes,which would provide some architecture and algorithm design guidance for the development of high-power,multi antenna CCFD equipment.

关 键 词：同时同频全双工 自干扰 干扰抑制 非线性 

分 类 号：TN929.5[电子电信—通信与信息系统]